This is the shotgun that White House Correspondents’ Dinner gunman Cole Allen allegedly sneaked into the Washington Hilton in an attempt to kill President Trump and top members of his administration. Allen , 31, was allegedly brandishing the Mossberg Maverick 12-gauge when he rushed toward security inside the Washington Hilton hotel in DC on Saturday night. The pump-action shotgun has a folding stock that made it easier to conceal, as well as pistol grip and an extended magazine tube. Cole Allen with a Mylar blanket after he was detained for allegedly opening fire at the White House Correspondents’ Dinner. One of the weapons used in the White House Correspondents’ Dinner shooting. Allen legally purchase the weapon from Turner’s Outdoorsman near his home in Torrance, California, last August, according to sources.…